Locking device for the roof of a convertible car

ABSTRACT

A closing device for a folding top of a convertible is provided with a one-handed swiveling handle ( 5 ), which is supported in the longitudinal median plane ( 4 ) of the vehicle at the roof peak part ( 2 ). This one-handed swiveling device ( 5 ) has a connecting rod ( 9 ), which extends symmetrically to the longitudinal median plane ( 4 ) of the vehicle and transfers a swiveling motion (C). In an inventive embodiment, the connecting rod ( 9 ) is constructed as a torsion bar (T), which can be shifted jointly with the swiveling handle ( 5 ) about the drag bearing ( 14 ) of the latter at the roof peak part ( 2 ). The end parts ( 7 ) of the torsion bar (T) are mounted in each case immovably at the roof peak part ( 2 ) in the region of the locking organs ( 12 ) engaging the windshield frame ( 3 ).

[0001] The invention relates to a closing device for a folding top for a convertible, as defined in the introductory portion of claim 1.

[0002] The invention is concerned with the problem of creating a closing device for the folding top of a convertible of the type, known from DE 92 032 85 U1, for which the actuating and locking organs are controlled functionally reliably with a small number of individual components, can be shifted, when not in use, into a position, in which the danger of damage and injury to the user is less and the operating comfort is improved.

[0003] Pursuant to the invention, this objective is accomplished by a closing device with the distinguishing features of claim 1. With respect to important further developments of the distinguishing features, reference is made to claims 2 to 15.

[0004] With the torsion bar, which is provided for transferring the operating motion of the swiveling handle and has a profiled bend in the longitudinal direction, the inventive closing device is changed structurally, so that the swiveling handle, interacting with the two supporting/swiveling connections to the roof peak part, provided at the ends of the torsion bar, and towards the respective locking organs, forms a kinematic chain, which makes possible a movement, independent of the user, in the form of a forced control. After the device is actuated by means of the manually operated swiveling handle, the latter, and the locking organs of the closing device are shifted automatically, without additional hand movements, into a storage position. After that, components, which can be moved out of the roof plane, are secured in a position largely inaccessible to the user. With that, while the operating comfort is improved, injuries due to inadvertent contact with protruding components of the closing device are avoided.

[0005] The components of this forced control for the closing device are integrated with little technical effort in the roof peak part of the folding top so that, with few individual parts to be installed, a functionally reliable opening and closing kinematic is achieved. Due to an unimpeded accessibility of the simply constructed components, a rapid, low-cost, partial installation is possible during installation or repair work in the region of the closing device and, in the case of different tolerance dimensions, for example, in the region between the locking components and the abutment at the windshield frame, expensive adaptations are unnecessary, because of the parts, which can be adjusted simply.

[0006] With regard to further details and advantageous developments of the inventive closing device, reference is made to the following description and the drawing, in which an example of the object of the invention is illustrated in greater detail diagrammatically. In the drawing

[0007]FIG. 1 shows a sectional representation of a partial region of a roof peak, in which there is a closing device for a folding top of a convertible, the details of which are not shown,

[0008] FIGS. 2 to 6 each show a sectional representation of the closing device in the region of a swiveling handle, which is supported in the longitudinal median plane of the vehicle and the components of which in each case have different movement phases,

[0009]FIG. 7 shows an enlarged sectional representation of the closing device in the region of one of the lateral locking organs of FIG. 1 and

[0010] FIGS. 9 to 13 show a sectional representation along a line III-III in FIG. 1 with different movement phrases in the region of the locking organ.

[0011] In FIG. 1, a closing device, which is labeled 1 as a whole, is shown in the left part of a roof peak 2, by means of which the folding top of a convertible, the details of which are not shown, can be locked in the region of the windshield frame 3 (FIG. 2). The closing device 1 is provided with a single-handed swiveling handle 5, which is supported at the roof peak part 2 in the region of the longitudinal median plane 4 of the vehicle. In its actuating region 6, the single-handed swiveling handle 5 has a connecting rod 9, which extends symmetrically to the longitudinal median plane 4 of the vehicle and by means of which a swiveling movement (arrow C, FIG. 3), produced by the hand movement of a user, is transferred synchronously to the end parts 7 (and 8, not shown). The respective end part 7, 8, is provided with a locking organ 12 which, in the closed position of the folding top, engages an abutment 11 (FIG. 8) at the windshield frame 3 and is, in turn, guided pivotably by a holding body 13 (FIG. 7).

[0012] For the inventive closing device 1, the connecting rod is constructed as a torsion bar T, which can be displaced jointly with the swiveling handle 5 about the drag bearing 14 of the latter at the roof peak part 2 and the end part 7 (or 8) in each case is mounted immovably at the roof peak part 2 in the region of the locking organ 12. Starting out from its middle part 15, which is fixed non-rotationally at the swiveling handle 5, the torsion bar T, in the longitudinal direction to the locking organ 12, in each case has an arched profiled part 16, so that, with the latter, a distance A, integrated into the torsion bar T, is formed between the middle part 15 and the offset-extending end part 7. The end part 7 of the torsion bar T, in turn, is supported immovably over an external and an internal friction bearing 17, 18.

[0013] Due to this construction of the kinematic chain within the closing device 1 with the torsion bar which, on the one hand, can be displaced by a manual actuation in the region of the swiveling handle 5 and, on the other, pivotably takes hold of the respective locking organ 12 at the roof peak part 2, it is achieved that, when the folding top is displaced into the open position (FIG. 6), elastic stresses, which act as restoring forces, are produced in the closed position 1. With that, after the manual actuation is ended, the central swiveling handle 5 as well as the respective locking organ 12 in the region of the holding body 13 can be returned automatically towards the roof peak part 2 into a storage position (arrow Z, FIG. 6 or arrow Z′, FIG. 13), these two components having opposite swiveling directions.

[0014] The plan view of FIG. 1 shows that the drag bearing 14 of the swiveling handle 5 has a swiveling axis 19 which, in the closed position (FIG. 2) of the folding top lies, in the direction of the longitudinal median plane 4 of the vehicle, in front of the actuating region 6 of the swiveling handle 5 and, parallel in front of this swiveling axis 19, the torsion bar T is connected by a connecting axis 20, formed by the middle part 15 of the swiveling axis 19, with the swiveling handle 5. The swiveling position of FIG. 4 illustrates in a sectional side view that the swiveling handle 5 defines a first lever part H, which extends to the swiveling axis 19 of the swiveling handle 5 and, on the other hand, acts together with a second lever part H′ in the form of a connecting strut 22, which takes hold of the middle part 15 of the torsion bar T in the region of the connecting axis 20.

[0015] Starting out from the width, available for the connecting strut 22 (with the lever length H′) in the roof part 2 or in a molded trough 21, the lever ratio H/H′ can be selected so that, by an optimum translation with the slight manual force of an operator, the torsional resistance of the torsion bar T and the frictional resistance in the region of the friction bearing 17, 18, are overcome and a problem-free unlocking is possible. This displacement of the torsion bar T (sequence of motions of FIGS. 3 to 5) together with the locking organs 12, can be carried out manually even by an operator with little practice, so that the roof peak part 3 can be detached simply with a high degree of operational comfort from the windshield frame 3 (FIG. 6, FIG. 13).

[0016] The displacement of the torsion bar T in the region of its central connecting axis 20 takes place during the opening movement by means of the swiveling handle 5 on a movement path (FIG. 5) extending above the drag bearing 14 or the swiveling axis 19 extending as an arc of a circle K. During this swiveling motion, the torsion bar T is shifted freely within the molded trough 21, provided in the roof peak part 2, during the opening as well as during the closing process.

[0017] In FIG. 2, the swiveling handle 5 is shown in its closed position and has a lockable dead center position. For this locking, a locking hook 23, which is constructed essentially symmetrically to its swiveling axis 24 and has, on the one hand, a pressure leg 25 and, on the other, a hook part 26, is provided at the swiveling handle 5. By introducing a compressive force, illustrated by an arrow D, on the pressure leg 25, for example, by exerting thumb pressure, the locking hook 23 is swiveled about the swiveling axis 24 (arrow A), a peak part 27 of the pressure leg 25 is shifted into a locking notch 28 at the swiveling handle 5 and, at the same time, a latch 29 of the hook part 26 is detached from an abutment 30 at the roof peak part 2 (FIG. 3). After that, the swiveling handle 5 can be shifted in the opening direction (arrow C), the locking hook 23 being moved through an opening 21′ out of the roof peak part 2. The locking hook 23 is supported at the swiveling handle 5 by a return spring, which is not shown, so that, after the unlocking phase, the locking hook 23 can be swiveled automatically by the compressive force D out of the index notch 28 and remains in the position shown in FIG. 4. The locking takes place in the reverse sequence of motions.

[0018] In this opening position (FIG. 5) of the swiveling handle 5, the hand of the operator remains at the actuating region 6 of the swiveling handle and the roof peak part 2 can be detached as a whole by a lifting motion (arrow 41′) from the windshield frame 3. During a positively guided return (not shown), which then becomes possible by means of the torsion bar T into the position of FIG. 2, the above described movement of the component in the reverse sequence takes place and the locking hook 23 is swiveled through the opening 2l′ into the roof peak part 2.

[0019] In FIG. 7, the support of the torsion bar T in the region of its end parts 7 is shown with structural details. It becomes clear that the end part 7 interacts with the two friction bearings 17, 18, which are disposed at a distance B, and between which the respective holding body 13 is provided with the locking organ 12. This perspective representation of FIG. 7 illustrates that the holding body 13 in each case is constructed as a U-shaped profiled part, which is supported in the region of a transverse axis 32, which is defined from the end part 7 of the torsion bar T and, in turn, defines the distance A to the connecting axis 20 of the middle part 15, by two parallel leg parts 33, 34 to the friction bearings 17, 18. A swiveling axis 35, supporting the locking organ 12, extends at a distance from this transverse axis 32 between the two leg parts 32 and 33.

[0020] In the region of the swiveling axis 35, the locking organ 12 is provided with a return spring 36, which is braced between the locking organ 12 and the holding body 13. The return spring 36 holds the locking organ 12 in the U-shaped holding body 13 (FIG. 7). During the opening and closing movements, this return spring 36 acts together with the torsion bar T and, during the introduction of a rotational movement E, synchronous with this opening movement C, the return spring 36, in the swiveling region of the holding body 13 (arrow 37), is acted upon with a pre-tension acting against the force of the spring. With that, after the opening process, the resetting of the components can be supported, so that the above-described movements, indicated by arrows Z and Z′ (FIG. 6 or 13), can be repeated functionally reliably a large number of times. In FIGS. 10 to 13, these movement phases are illustrated in the region of the locking organ 12 in a representation, which is synchronous with the movement phases of the swiveling handle 5 of FIGS. 3 to 6, so that, with these movement courses, the production of the pre-tensions can be reconstructed in the torsion bar T as well as in the return spring 36.

[0021] In the closed position, shown in FIG. 8, the locking organ 12, on the one hand, is held at the windshield frame 3 and, on the other, the locking organ 12 forms with the holding body 13 a dead center position, the two components lying in contact with one another in a region P and, with that, being fixed. When a swiveling motion C is introduced in the region of the swiveling handle 5, the holding body 13 is moved out of the dead center position (FIG. 9) and the locking organ 12 still remains at the windshield frame 3 in its closed position. As the opening process is continued in the region of the swiveling handle 5, the holding body 13 is swiveled in its swiveling direction 37 about the transverse axis 32, the locking organ 12 at the same time being released from the closed position at the abutment 11 (FIG. 10). At the same time, the locking organ 12 is guided from the abutment 11 into a region R, since the swiveling motion 37 in the region of the holding body 13 acts in this opening phase as a thrust motion in the region of the locking organ 12 (arrow F, FIG. 10).

[0022] The continuation of the swiveling motion in the region of the swiveling handle 5 leads to the swiveling positions of the locking organ 12, which are shown in FIGS. 11 to 13. In the inventive construction, a rear supporting shoulder 38 is provided at the locking organ 12 and makes contact with an abutment 39 of the roof peak part 2. With this contact of the components, the above-described pretension of the return spring 36 can be initiated, a swiveling motion (arrow 40) now taking place against the force of the restoring spring and the locking organ 12 being shifted against the movement (arrow 37) of the holding body 13 (FIG. 11). At the same time, the locking organ 12 is moved about the swiveling axis 35 (FIG. 12) and out of the region of the abutment 11 at the windshield frame 3. At the same time, the movement of the locking organ 12 is guided by means of the supporting shoulder 38 in the form of a connecting link guide. A radii contour 38′ of the supporting shoulder 38 rolls on a plane 39′ of the abutment 39, a non-positive restricted guidance of the components being achieved and, at the same time, the swiveling axis 35 being displaced in the direction of the longitudinal median plane of the vehicle. This shifting of the swiveling axis 35 takes place until the locking organ 12 assumes an essentially vertical position (FIG. 13). In this swiveling position, the folding top can now be raised into an opening position of arrow 41 without colliding with the windshield frame 3. A gap S, adequate for movement, is now formed between the locking organs 12 and the windshield frame 3, so that any unintended contact of the components is reliably avoided.

[0023] After the folding top is lifted off and the swiveling handle 5 is released by the operator, the components can be swiveled back by the operator as described above, the spring action between the parts 7, 15 of the torsion bar T, which was shifted during the opening process and the pre-tension, produced in the region of the restoring spring 36, at the same time being so effective, that the swiveling handle 5 automatically swivels back in the direction of the roof peak part 2 (opposite to the sequence of motions of FIGS. 2 to 7) and the locking organ 12 also is swiveled into a position approximately parallel to the roof peak part 2 (FIG. 2). With that, a storage position of the components of the closing device 1 is attained and the folding top, as a whole, can be shifted into an opening position in the rear of the vehicle, the details of which are not shown. At the same time, there are no protruding parts of the folding top in the region of the closing device 1, which may pose a danger to the operator.

[0024] For the sequence of motions described above, the locking organ 12 advisably is constructed in two parts with a locking hook 42 and a supporting body 43, which supports the locking hook 42. The supporting shoulder 38, which can be placed against the counter-contour of the roof peak 2, preferably is integrally molded in one piece with the supporting body 43. The locking hook 42 of the locking organ 12 is fixed at the supporting body 43, so that it can be shifted in an accommodating groove 44, so that, with little effort, the locking hook 42 or the locking organ 12 can be adapted optimally to the abutment 11 in the region of the windshield frame 3 by an adjustment by means of an adjusting screw 46. The locking hook 42 can be adjusted in such a manner in the direction of arrow N (FIG. 11) that, in the closed position, the locking organ 12 is clamped optimally and, with that, a reliably tight contact between the roof peak part 2 and the windshield frame 3 is achieved in the region of a sealing profile 47. 

1. A closing device for a folding top of a convertible, with a one-handed swiveling handle (5), which is supported in the longitudinal median plane (4) of the vehicle at the roof peak part (2) and at which a connecting rod (9), which extends symmetrically to the longitudinal median plane (4) of the vehicle and transfers a swiveling motion (C), is provided, the end parts (7) of which connecting rod (9) are provided with locking organs (12) which, in the closed position of the folding top, engage abutments (11) at the windshield frame (3) and which, in turn, are guided pivotably by a holding body (13), wherein the connecting rod (9) is constructed as a torsion bar (T), which can be shifted jointly with the swiveling handle (5) about the drag bearing (14) of the latter at the roof peak part (2) and the end parts (7) of the torsion bar (T) are mounted in each case immovably at the roof peak part (2) in the region of the locking organs (12).
 2. The closing device of claim 1, wherein the torsion bar (T), starting out from its middle part (15), which is fixed non-rotationally at the swiveling handle (5), has in the longitudinal direction to the locking organs (12) in each case an arc-shaped profile part (16), at which the end part (7), extending parallel to the middle part (15) (distance A), adjoins and, in turn, forms the stationary support towards the locking organ (12) with at least one friction bearing (17, 18).
 3. The closing device of claims 1 or 2, wherein the torsion bar (T), when the folding top is in the open position, forms a restricted guidance to the roof peak part (2), which guides the respective locking organ (12) in the region of the holding body (13) as well as the central swiveling handle (5) automatically into a storage position.
 4. The closing device of one of the claims 1 to 3, wherein the drag bearing (14) of the swiveling handle (5) has a swiveling axis (19) which, in the closed position of the folding top, lies in front of, as seen in the direction of the longitudinal median plane (4) of the vehicle, the actuating region (6) of the swiveling handle (5) and, parallel in front of this swiveling axis (19), the torsion bar (T) is connected with the swiveling handle (5) by a connecting axis (20) formed by the middle part (15).
 5. The closing device of one of the claims 1 to 4, wherein the swiveling handle (5) defines a first lever part (H), which extends towards the swiveling axis (19) of the swiveling handle (5) and, on the other hand, interacts with a second lever part (H′), which takes hold of the middle part (15) of the torsion bar (T) in the region of the connecting axis (20).
 6. The closing device of one of the claims 1 to 5, wherein the torsion bar (T), in the region of its middle connecting axis (20), can be swiveled during the opening motion of the swiveling handle (5) above the drag bearing (14) of the swiveling handle (5).
 7. The closing device of one of the claims 1 to 6, wherein the swiveling handle (5) and the locking organs (12) assume a lockable dead center position in the closed position of the folding top.
 8. The closing device of one of the claims 1 to 7, wherein a locking hook (23), which can be unlocked by finger pressure (arrow D), is mounted at the swiveling handle (5).
 9. The closing device of claim 8, wherein, on the one hand, the locking hook (23) has a pressure leg (25), which can be shifted into an index notch (28) at the swiveling handle (5) and, on the other, a hook part (29) is provided at the roof peak part (2), which grips behind an abutment (30).
 10. The closing device of one of the claims 1 to 9, wherein the torsion bar (T) interacts in the region of the respective end part (7) with two friction bearings (17, 18), which are disposed at a distance (B) and between which the respective holding body (13) with the locking organ (12) is provided.
 11. The closing device of one of the claims 1 to 9, wherein the holding body (13) for the locking organ (12) in each case is constructed as a U-shaped profiled part which, in the region of a transverse axis (32), defined by the end part (7) of the torsion bar (T), is supported by two parallel leg parts (33, 34) towards the friction bearings (17, 18), a swiveling axis (35), supporting the locking organ (12), extending at a distance from this transverse axis (32) between the two leg parts (33, 34) Of the U-shaped profiled part.
 12. The closing device of one of the claims 1 to 11, wherein the locking organ (12) is connected in the region of its swiveling axis (35) with a restoring spring (36), fixed to the holding body (13).
 13. The closing device of one of the claims 1 to 12, wherein the locking organ (12) is constructed in two parts with a locking hook (42) and a supporting body (43), which supports the locking hook (42), and has, at the other end, a supporting shoulder (38), which can be placed against an abutment (39) of the roof peak part (2).
 14. The closing device of claim 13, wherein the supporting shoulder (38), which is provided at the rear of the supporting body (43), is supported at a plane counter-contour (39′) of the roof peak part (2) in the form of a connecting link guide.
 15. The closing device of claims 13 or 14, wherein the looking hook (42) of the locking organ (12) is fixed at the supporting body (43) so that it can be shifted in an accommodating groove (44). 